Engine Builder Magazine recently featured a ZSR Engines build as their Engine of the Week! This 438 cid N/A small block Ford engine is running a SCAT 4.100″ stroke crankshaft.
‘We used a Dart block and did all of our normal machining to it – square checking, boring, a torque plate hone, and a line hone,’ Zach Smith, owner of ZSR Engines, says. ‘For the rotating assembly, we got custom, dome pistons from RaceTec. We used Molnar 6.250″ H-beam rods, a SCAT 4.100″ stroke crankshaft and a Bullet camshaft. We also used a ring set from MAHLE that has 1mm top and second rings and a 2mm oil ring. The engine also has Clevite-coated bearings.
This build made 2 horsepower per cubic inch on the dyno! It made 876 hp at 7,700 rpm and 640 ft.-lbs of torque at 6,800 rpm.
Read the full article here.
